目的：了解小儿急性肾小球肾炎左室心缩间期的改变。方法：用同步描记心音图、颈动脉搏动图和心电图的方法测定４６例急性肾小球肾炎患儿的心缩间期。结果：肾炎急性期患儿ＩＣＴ、ＰＥＰ延长，Ｐ／Ｌ大于正常，均有高度显著性，肾炎恢复期上述指标基本恢复正常。结论：急性肾小球肾炎伴有心动能改变，但经及时合理治疗其预后良好。 Objective: To understand the changes of left ventricular systolic phase in children with acute glomerulonephritis. Methods: The systolic phase of 46 children with acute glomerulonephritis was measured by synchronous tracing of phonocardiogram, carotid artery pulsation and electrocardiogram. Results: The levels of ICT and PEP in children with acute nephritis were prolonged and the P / L was greater than normal. The indexes of nephritis recovered to normal after the recovery. Conclusions: Acute glomerulonephritis is associated with changes in cardiac function, but its prognosis is good after timely and reasonable treatment.